Topics and Guests for August 1

British police are on guard after warnings that another team of suicide bombers (search) is plotting a third attack on the city. So is the beefed up security just a "show of force" to discourage attackers or are authorities responding to a specific threat? Robert Ayers, homeland security and intelligence expert, weighs in.

Then, one of the London terror suspects allegedly made a phone call to Saudi Arabia just hours before his arrest. Another suspect told friends that he went there for several months for a "training course." So how does Saudi Arabia — home to Usama bin Laden and 15 of the 19 9/11 hijackers — tie in? We'll get insight from Mamoun Fandy, author of "Saudi Arabia and the Politics of Dissent" and a senior fellow at the Baker Institute.

President Bush bypasses Congress and appoints John Bolton (search) to be the next U.S. ambassador to the United Nations. Will Bolton get tough on the U.N. when it comes to fighting the global War on Terror? We'll ask Frank Gaffney, former assistant secretary of defense, and Lee Wolosky, former director for transnational threats on the National Security Council under former presidents Clinton and George H. W. Bush.

And, should we be politically correct i.e. not use racial profiling when fighting the War on Terror? Bill Gavin, former assistant acting director of the New York FBI, weighs in.